duct tape, no one is saying that you are wrong, but it DOES sound to me as if you are saying the WE are wrong, also, (and repeatedly) because we don't exactly agree with you. We DO encourage spirited debates here, you've been here long enough to have seen one or two, I'd bet, but we all respect everybody's opinions, we always have.
DYohn and Steven have both expressed the pros and cons of running an amplifer at higher vs. lower impedances. Here is really what it boils down to:
Lower impedance
Pros:
More power
Higher SPL
Cons:
More total heat
More distortion
Lower damping factor
Lower efficiency
Shortened electronics life
Higher impedance
Pros:
Less total heat
Less distortion
Higher damping factor
Higher efficiency
Longer electronics life
Cons:
Less power
Lowered SPL
Those are all concrete and PROVABLE differences, (with the possible exception of the damping factor thing...) and to my eyes, the higher impedance load seems to be the better choice. The difference in sheer SPL output in running a 4 ohm load, vs a 2 ohm load is ONLY 3dB, (which in a competition is a HUGE number, especially when winners go home with a .1dB advantage, but) in a daily driver, that won't be noticed as a loss; and really, the improved fidelity due to lowered distortion and improved control over the woofers will most likely be perceived as a substantial benefit.
The big one for me, (actually the big two, the first being the distortion thing... oh, and the damping factor thing.

) is the efficiency. For a lower impedance, there is MORE HEAT PROPORTIONATELY produced for a given output. This means that if an amplifier is 60% efficient at 4 ohms, (a typical Class AB number) it could be as low as 50% efficient at 2 ohms. (Also a fairly typical number, in the case of Class AB) It doesn't maintain it's efficiency at all loads. More proportionate stress on the electrical system... Less (or lower) efficiency is a bad thing. Class D amplifers suffer the SAME efficiency drop, although they DO start at a higher reference efficiency, true.
Even IF an amplifier is designed to run safely at a given load, a one degree rise in temperature will cause as much as a 25% reduction in total life of ANY electronic device, such as a transistor. Capacitors are even MORE sensitive to it; they're more like 50 to 60%. Doesn't it make even more sense to reduce the operating temperature of any electronic component, now? Obviously, the devices are RATED for such operating temperatures, but the rule above also applies for a REDUCTION of temperature. Run a device one degree COOLER, and it will last up to 25% LONGER... THERE'S your money savings!
You also mentioned that the entire car audio industry would agree with you. I personally take exception to that,
and I can get you in contact with two engineers (ok, one engineer and one engineer intern

) at Harman International in Northridge, CA, that DO NOT disagree with me or the other accepted (and NOT wrong) views on this forum. I guarantee
you, that I do not disagree with you, and I DO understand your logic, but it is NOT the only view, and we could throw that back at you as well...
(How's that? (And that person knows to whom I am referring...))
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."